Source code quote in SQLn° 167

CREATE FUNCTION [dbo].[get_number_of_workers] 
(
	 @number_of_workers varchar(10)

)
RETURNS int
AS
BEGIN


set @number_of_workers = replace(replace(replace(replace(LTRIM(RTRIM(@number_of_workers)), char(9), ''), char(10), ''), char(13),''), char(13)+char(10), '')

DECLARE @temp varchar(10)

SELECT
	@temp = number_of_workers 
FROM
	(SELECT LTRIM(RTRIM(@number_of_workers)) as number_of_workers) as temp
WHERE
	   number_of_workers like  '[0-9]'
	or number_of_workers like  '[0-9][0-9]'
	or number_of_workers like  '[0-9][0-9][0-9]'
	or number_of_workers like  '[0-9][0-9][0-9][0-9]'
	or number_of_workers like  '[0-9][0-9][0-9][0-9][0-9]'
	or number_of_workers like  '[0-9][0-9][0-9][0-9][0-9][0-9]'
	or number_of_workers like  '[0-9][0-9][0-9][0-9][0-9][0-9][0-9]'
	or number_of_workers like  '[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]'
	or number_of_workers like  '[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]'
	or number_of_workers like  '[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]'
	or number_of_workers like  '[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]'
	
	
RETURN CONVERT(INT, @temp)

END